Punching-machine.



PATENTED MAY 5, 1908.

W. T. SEARS, PUNGHING MACHINE. AlPLIOATIOH FILED MAY 9, 1905.

2 SHEETS-SHEET 1.

WILLARD '1. SEARS, Oil HARRISBURG, PENNSYLVANIA.

PUNGHING-MACHINE.

' Specification of Letters Patent.

Patented May 6, 19 08,

Application flled. May 9, 1906. Serial No 259,578.

To all whom it may concern:

Be it knownthat I, WILLARD TySnaas, a citizen of the .United States, residing in Harrisburg, Pennsylvania, have invented certain Improvements in Punchin -Machines,-

of which the following is a speci cation.

My invention consists of an improved machine particularly designed for punching both webs or flanges of angles or like sections during a single passage of such sections through the machine.

The invention further consists of a punching machine having a plurality of reciprocating unches constructed'to act in lines at an ang e to each other upon two portions of an angle or other section moved in a line preferably at right angles to the plane including the lines of action of the said two punches.

My invention further consists of a machine having two punches constructed to act in lines at angle to each other upon the same piece of material and capable of transverse adjustment whereby it is possible to cause them to act in different lines parallel to each other.

The objects of theinvention'are to reduce the'amount of time and labor required to punch a given number of holes in an angle or other section and also to so punch said holes that it will notbe necessary to straighten the section either during'or after the punchin operation.

n the drawings herewith :-Figure 1, is a front elevation of one form of my invention illustrating the construction of a machine having punches designed to act upon the two Webs or flanges of angle sections; Fig. 2, is a side elevation of the machine shown in Fig. 1; Fig.3, is an enlarged sectional elevation taken on the line 3'3, Fig. 1, and illustrating certain detail features of my invention; and Fig. 4 is a slightly modified form of my invention.

In the above drawings, A is the frame of the machine, consisting of a standard carrying two guideways A and A, which are of such construction that the punching heads a and a operating therein are movable in lines which inthe present instance'are at right angles to each other. I

There are for each punching head bearings a supporting eccentric shafts a for reciprocating said heads by means of eccentries in the well known manner, and there is in addition a third bearing a for a main shaft a upon which a pinion, shown in dotted lines at a meshes with two gear wheels a, respectively connected to the shafts a The eccentrics of the shafts a are so set that vthe heads are operated to cause successive action of their respective punches. The main shaft also carries a gear wheel a operated from any desired source of power, in addition to which there is a fly wheel a It will be understoodthat, if desired, controlling mechanism may be employed to connect and disconnect the main shaft with its source of power at will, but inasmuch as this forms no part of the resent invention, I have not illustrated it. here is also carried upon the frame A an anvil a having two faces respectively at right angles to the lines of action of the two punching heads, and in order that each punch may be capable of acting at different points across its particular face of the anvil I su port the punches B so that the are capable of adjustment in lines paralle to their respective faces on said anvil. With this idea in view I form the lower part of each head, as shown in Figs. 1 and 3, with a transverse guideway, slidably mounting thereupon an auxiliary head C, which carries the punch B. Each of said heads has a clamping bolt 0 by which it may be held in any adjusted position.

ehind each punch I provide a stripper D, supporting this from the frame of the machine and equi ping it with a roller (1 carried upon a roller earing d. I also provide in the auxiliary head C a gag c, which may be moved from the position shown in Fig. 3, to a position over the head of the punch B so as to prevent motion of said punch in said head and thereby cause it to act to make a hole in a suitably placed piece of material.

It will be understood that under operating conditions the two punching heads a and a, are alternately reciprocated, but the punches B are inactive b reason of the fact that the gags are norma ly so placed as to permit them to move into their respective auxiliary heads at each stroke. If, however, the angle section F be placed upon the anvil a", as shown in Fig. l and the gags of both punches be moved so as to cause them to operate, it will be seen that holes will be punched in both webs of said an 1e, after which the gags may be automatica y or manually thrown into their inactive positions and the angle moved through the machine, in a line at right angles to the plane including the lines of action of i moved transversely upon their respective lines of action of the reciprocating heads so as to adapt them for use on angles of different sizes, as well as to ernut ho es to be made 1n the same angle at ifierent distances from its edges. The stripper rollers 11 effectually prevent their respectlve punches from hftmgthe sectlon operated upon and thereby causlng breakage of said unches. I

If esired, the machine may be made in the form shown in Fig. 4, in which the frame A is provided with a reciprocating punching head 6 and an operating shaft b therefor, arranged in very much the same manner as is customary in unching machines of the ordinary type. here is, however, in addition a beveled gear 12 upon the shaft 6' meshing with a second ear 6 upon an'eccentric shaft b at right ang es to said shaft I). Said shaft 12 actuates a punching head I) so as to operate it'in a line at right angles to the head I) and cause its punchto form holes in the flange of an angle placed upon the anvil b which is at right angles to the flange acted on by the punch of the head 6. As before, it will be seen that the angle or other section operated is moved through the machine in a line substantially at right angles to the plane including the hues of action of the two punches.

While I preferably employ the two punching heads opposite each other so that the lines ofaction of the a plane at right angles to the line of movement of an angle through the machine, it is to be understood that the invention also contem lates an arrangement'of the reciprocating eads in which msteadpf being 0 posite each other, one of the punches is to the rear of the other. Under these conditions the punches lie in parallel planes at right angles to the line of motion of a section operate on and it is my desire to broadly cover such construction.

"chine is much higher than punches are literally in- By punching the holes alternately in the two flanges of an angle the curvature thereof is almost entirely prevented, or if it should occur in some cases the angle may be straightened in one instead of two 0 erations as has hitherto been necessary. oreover, it will be seen that the efficiency of the mahas'been previously the case,- for not only does it perform a piece of work in but little more than half the time hitherto required but its power consumption is materially less than two machines would require.

I claim as my invention:

1. A punching machine including a reciprocable unch, an anvil therefor, and a stripper for t e punch provided with an antifrictlon roller supported adjacent to and immediately to the rear of said punch, substantially as described.

2. A machine for punching angles or the like including two punches operative in lines at an angle to each other, an anvil extending in a'line transverse to the plane or lanes 0 the punches, and two strippers eac having an antifriction roller mounted immediatel to the rear of the respective punches in suc positions that their axes. are at an angle to each other, substantially as described.

3. A machine for punching angles or the like includingtwo punches operative in lines at an angle to each other, an anvil having two faces at an angle to each other and respectively at right an les to the lines of act1on of the 1punches, w1th a stri per for each punch, eac including an antii ilction roller supported adjacent to and immediatelyto the rear of each unch and adjacent to the anvil therefor, su stantiall as described.

In testimony whereof, have signed my name to this specification, in the presence of two subscribing witnesses.

WILLARD :T. SEARS. 

